<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
 *
 * @version $Id: tbl_relation.php 11366 2008-07-04 14:36:18Z lem9 $
 */

/**
 * Gets some core libraries
 */
require_once './libraries/common.inc.php';
require_once './libraries/tbl_common.php';
$url_query .= '&amp;goto=tbl_sql.php';


/**
 * Gets tables informations
 */
require_once './libraries/tbl_info.inc.php';

// Note: in libraries/tbl_links.inc.php we get and display the table comment.
// For InnoDB, this comment contains the REFER information but any update
// has not been done yet (will be done in tbl_relation.php later).
$avoid_show_comment = TRUE;

/**
 * Displays top menu links
 */
require_once './libraries/tbl_links.inc.php';

require_once './libraries/relation.lib.php';

$options_array = array('CASCADE' => 'CASCADE', 'SET_NULL' => 'SET NULL', 'NO_ACTION' => 'NO ACTION', 'RESTRICT' => 'RESTRICT');

/**
 * Generate dropdown choices
 *
 * @param   string   Message to display
 * @param   string   Name of the <select> field
 * @param   array	Choices for dropdown
 * @return  string   The existing value (for selected)
 *
 * @access  public
 */
function PMA_generate_dropdown($dropdown_question, $radio_name, $choices, $selected_value)
{
	echo $dropdown_question . '&nbsp;&nbsp;';

	echo '<select name="' . $radio_name . '">' . "\n";
	echo '<option value="nix">--</option>' . "\n";

	foreach ($choices AS $one_value => $one_label) {
		echo '<option value="' . $one_value . '"';
		if ($selected_value == $one_value) {
			echo ' selected="selected" ';
		}
		echo '>' . $one_label . '</option>' . "\n";
	}
	echo '</select>' . "\n";
	echo "\n";
}


/**
 * Gets the relation settings
 */
$cfgRelation = PMA_getRelationsParam();


/**
 * Updates
 */

// ensure we are positionned to our current db (since the previous reading
// of relations makes pmadb the current one, maybe depending on the MySQL version)
PMA_DBI_select_db($db);

if ($cfgRelation['relwork']) {
	$existrel = PMA_getForeigners($db, $table, '', 'internal');
}
if ($tbl_type=='INNODB') {
	$existrel_innodb = PMA_getForeigners($db, $table, '', 'innodb');
}
if ($cfgRelation['displaywork']) {
	$disp	 = PMA_getDisplayField($db, $table);
}

// u p d a t e s   f o r   I n t e r n a l	r e l a t i o n s
if (isset($destination) && $cfgRelation['relwork']) {

	foreach ($destination AS $master_field => $foreign_string) {
		if ($foreign_string != 'nix') {
			list($foreign_db, $foreign_table, $foreign_field) = explode('.', $foreign_string);
			if (!isset($existrel[$master_field])) {
				$upd_query  = 'INSERT INTO ' . PMA_backquote($GLOBALS['cfgRelation']['db']) . '.' . PMA_backquote($cfgRelation['relation'])
							. '(master_db, master_table, master_field, foreign_db, foreign_table, foreign_field)'
							. ' values('
							. '\'' . PMA_sqlAddslashes($db) . '\', '
							. '\'' . PMA_sqlAddslashes($table) . '\', '
							. '\'' . PMA_sqlAddslashes($master_field) . '\', '
							. '\'' . PMA_sqlAddslashes($foreign_db) . '\', '
							. '\'' . PMA_sqlAddslashes($foreign_table) . '\','
							. '\'' . PMA_sqlAddslashes($foreign_field) . '\')';
			} elseif ($existrel[$master_field]['foreign_db'] . '.' .$existrel[$master_field]['foreign_table'] . '.' . $existrel[$master_field]['foreign_field'] != $foreign_string) {
				$upd_query  = 'UPDATE ' . PMA_backquote($GLOBALS['cfgRelation']['db']) . '.' . PMA_backquote($cfgRelation['relation']) . ' SET'
							. ' foreign_db	   = \'' . PMA_sqlAddslashes($foreign_db) . '\', '
							. ' foreign_table	= \'' . PMA_sqlAddslashes($foreign_table) . '\', '
							. ' foreign_field	= \'' . PMA_sqlAddslashes($foreign_field) . '\' '
							. ' WHERE master_db  = \'' . PMA_sqlAddslashes($db) . '\''
							. ' AND master_table = \'' . PMA_sqlAddslashes($table) . '\''
							. ' AND master_field = \'' . PMA_sqlAddslashes($master_field) . '\'';
			} // end if... else....
		} elseif (isset($existrel[$master_field])) {
			$upd_query	  = 'DELETE FROM ' . PMA_backquote($GLOBALS['cfgRelation']['db']) . '.' . PMA_backquote($cfgRelation['relation'])
							. ' WHERE master_db  = \'' . PMA_sqlAddslashes($db) . '\''
							. ' AND master_table = \'' . PMA_sqlAddslashes($table) . '\''
							. ' AND master_field = \'' . PMA_sqlAddslashes($master_field) . '\'';
		} // end if... else....
		if (isset($upd_query)) {
			$upd_rs		 = PMA_query_as_cu($upd_query);
			unset($upd_query);
		}
	} // end while
} // end if (updates for internal relations)

// u p d a t e s   f o r   I n n o D B
// (for now, one index name only; we keep the definitions if the
// foreign db is not the same)
// I use $sql_query to be able to display directly the query via
// PMA_showMessage()

if (isset($_REQUEST['destination_innodb'])) {
	$display_query = '';
	$seen_error = false;
	foreach ($_REQUEST['destination_innodb'] as $master_field => $foreign_string) {
		if ($foreign_string != 'nix') {
			list($foreign_db, $foreign_table, $foreign_field) = explode('.', $foreign_string);
			if (!isset($existrel_innodb[$master_field])) {
				// no key defined for this field

				// The next few lines are repeated below, so they
				// could be put in an include file
				// Note: I tried to enclose the db and table name with
				// backquotes but MySQL 4.0.16 did not like the syntax
				// (for example: `base2`.`table1`)

				$sql_query  = 'ALTER TABLE ' . PMA_backquote($table)
							. ' ADD FOREIGN KEY ('
							. PMA_backquote($master_field) . ')'
							. ' REFERENCES '
							. PMA_backquote($foreign_db) . '.'
							. PMA_backquote($foreign_table) . '('
							. PMA_backquote($foreign_field) . ')';

				if ($_REQUEST['on_delete'][$master_field] != 'nix') {
					$sql_query   .= ' ON DELETE ' . $options_array[$_REQUEST['on_delete'][$master_field]];
				}
				if ($_REQUEST['on_update'][$master_field] != 'nix') {
					$sql_query   .= ' ON UPDATE ' . $options_array[$_REQUEST['on_update'][$master_field]];
				}
				$sql_query .= ';';
				$display_query .= $sql_query . "\n";
				// end repeated code

			} elseif (($existrel_innodb[$master_field]['foreign_db'] . '.' .$existrel_innodb[$master_field]['foreign_table'] . '.' . $existrel_innodb[$master_field]['foreign_field'] != $foreign_string)
			  || ($_REQUEST['on_delete'][$master_field] != (!empty($existrel_innodb[$master_field]['on_delete']) ? $existrel_innodb[$master_field]['on_delete'] : 'nix'))
			  || ($_REQUEST['on_update'][$master_field] != (!empty($existrel_innodb[$master_field]['on_update']) ? $existrel_innodb[$master_field]['on_update'] : 'nix'))
				   ) {
				// another foreign key is already defined for this field
				// or
				// an option has been changed for ON DELETE or ON UPDATE

				// remove existing key
				if (PMA_MYSQL_INT_VERSION >= 40013) {
					$sql_query  = 'ALTER TABLE ' . PMA_backquote($table)
								. ' DROP FOREIGN KEY '
								. PMA_backquote($existrel_innodb[$master_field]['constraint']) . ';';

					// I tried to send both in one query but it failed
					$upd_rs	 = PMA_DBI_query($sql_query);
					$display_query .= $sql_query . "\n";
				}

				// add another
				$sql_query  = 'ALTER TABLE ' . PMA_backquote($table)
							. ' ADD FOREIGN KEY ('
							. PMA_backquote($master_field) . ')'
							. ' REFERENCES '
							. PMA_backquote($foreign_db) . '.'
							. PMA_backquote($foreign_table) . '('
							. PMA_backquote($foreign_field) . ')';

				if ($_REQUEST['on_delete'][$master_field] != 'nix') {
					$sql_query   .= ' ON DELETE '
						. $options_array[$_REQUEST['on_delete'][$master_field]];
				}
				if ($_REQUEST['on_update'][$master_field] != 'nix') {
					$sql_query   .= ' ON UPDATE '
						. $options_array[$_REQUEST['on_update'][$master_field]];
				}
				$sql_query .= ';';
				$display_query .= $sql_query . "\n";

			} // end if... else....
		} elseif (isset($existrel_innodb[$master_field])) {
			if (PMA_MYSQL_INT_VERSION >= 40013) {
				$sql_query  = 'ALTER TABLE ' . PMA_backquote($table)
						. ' DROP FOREIGN KEY '
						. PMA_backquote($existrel_innodb[$master_field]['constraint']);
				$sql_query .= ';';
				$display_query .= $sql_query . "\n";
			}
		} // end if... else....

		if (! empty($sql_query)) {
			$upd_rs	= PMA_DBI_try_query($sql_query);
			$tmp_error = PMA_DBI_getError();
			if (! empty($tmp_error)) {
				$seen_error = true;
			}
			if (substr($tmp_error, 1, 4) == '1216'
			||  substr($tmp_error, 1, 4) == '1452') {
				PMA_mysqlDie($tmp_error, $sql_query, FALSE, '', FALSE);
				echo PMA_showMySQLDocu('manual_Table_types', 'InnoDB_foreign_key_constraints') . "\n";
			}
			if (substr($tmp_error, 1, 4) == '1005') {
				echo '<p class="warning">' . $strForeignKeyError . ' : ' . $master_field
					.'</p>'  . PMA_showMySQLDocu('manual_Table_types', 'InnoDB_foreign_key_constraints') . "\n";
			}
			unset($tmp_error);
			$sql_query = '';
		}
	} // end foreach
	if (!empty($display_query)) {
		if ($seen_error) {
			PMA_showMessage($strError);
		} else {
			PMA_showMessage($strSuccess);
		}
	}
} // end if isset($destination_innodb)


// U p d a t e s   f o r   d i s p l a y   f i e l d

if ($cfgRelation['displaywork']
	&& isset($display_field)) {

	if ($disp) {
		if ($display_field != '') {
			$upd_query = 'UPDATE ' . PMA_backquote($GLOBALS['cfgRelation']['db']) . '.' . PMA_backquote($cfgRelation['table_info'])
					   . ' SET display_field = \'' . PMA_sqlAddslashes($display_field) . '\''
					   . ' WHERE db_name  = \'' . PMA_sqlAddslashes($db) . '\''
					   . ' AND table_name = \'' . PMA_sqlAddslashes($table) . '\'';
		} else {
			$upd_query = 'DELETE FROM ' . PMA_backquote($GLOBALS['cfgRelation']['db']) . '.' . PMA_backquote($cfgRelation['table_info'])
					   . ' WHERE db_name  = \'' . PMA_sqlAddslashes($db) . '\''
					   . ' AND table_name = \'' . PMA_sqlAddslashes($table) . '\'';
		}
	} elseif ($display_field != '') {
		$upd_query = 'INSERT INTO ' . PMA_backquote($GLOBALS['cfgRelation']['db']) . '.' . PMA_backquote($cfgRelation['table_info'])
				   . '(db_name, table_name, display_field) '
				   . ' VALUES('
				   . '\'' . PMA_sqlAddslashes($db) . '\','
				   . '\'' . PMA_sqlAddslashes($table) . '\','
				   . '\'' . PMA_sqlAddslashes($display_field) . '\')';
	}

	if (isset($upd_query)) {
		$upd_rs	= PMA_query_as_cu($upd_query);
	}
} // end if

// If we did an update, refresh our data
if (isset($destination) && $cfgRelation['relwork']) {
	$existrel = PMA_getForeigners($db, $table, '', 'internal');
}
if (isset($destination_innodb) && $tbl_type=='INNODB') {
	$existrel_innodb = PMA_getForeigners($db, $table, '', 'innodb');
}

if ($cfgRelation['displaywork']) {
	$disp	 = PMA_getDisplayField($db, $table);
}


/**
 * Dialog
 */

// common form
echo '<form method="post" action="tbl_relation.php">' . "\n";
echo PMA_generate_common_hidden_inputs($db, $table);


// relations

if ($cfgRelation['relwork'] || $tbl_type=='INNODB') {
	// To choose relations we first need all tables names in current db
	// and if PMA version permits and the main table is innodb,
	// we use SHOW TABLE STATUS because we need to find other InnoDB tables

	if ($tbl_type=='INNODB') {
		$tab_query		   = 'SHOW TABLE STATUS FROM ' . PMA_backquote($db);
	// [0] of the row is the name
	// [1] is the type
	} else {
		$tab_query		   = 'SHOW TABLES FROM ' . PMA_backquote($db);
	}
	// [0] of the row is the name

	$tab_rs			  = PMA_DBI_query($tab_query, null, PMA_DBI_QUERY_STORE);
	$selectboxall['nix'] = '--';
	$selectboxall_innodb['nix'] = '--';

	while ($curr_table = @PMA_DBI_fetch_row($tab_rs)) {
		if (($curr_table[0] != $table) && ($curr_table[0] != $cfg['Server']['relation'])) {
			PMA_DBI_select_db($db);

			// need to use PMA_DBI_QUERY_STORE with PMA_DBI_num_rows() in mysqli
			$fi_rs	= PMA_DBI_query('SHOW KEYS FROM ' . PMA_backquote($curr_table[0]) . ';', null, PMA_DBI_QUERY_STORE);
			if ($fi_rs && PMA_DBI_num_rows($fi_rs) > 0) {
				$seen_a_primary = FALSE;
				while ($curr_field = PMA_DBI_fetch_assoc($fi_rs)) {
					if (isset($curr_field['Key_name']) && $curr_field['Key_name'] == 'PRIMARY') {
						$seen_a_primary = TRUE;
						$field_full = $db . '.' .$curr_field['Table'] . '.' . $curr_field['Column_name'];
						$field_v	= $curr_field['Table'] . '->' . $curr_field['Column_name'];
						$selectboxall[$field_full] =  $field_v;
						// there could be more than one segment of the primary
						// so do not break

						// Please watch here, tbl_type is INNODB but the
						// resulting value of SHOW KEYS is InnoDB

						if ($tbl_type=='INNODB' && isset($curr_table[1]) && $curr_table[1]=='InnoDB') {
							$selectboxall_innodb[$field_full] =  $field_v;
						}

					} elseif (isset($curr_field['Non_unique']) && $curr_field['Non_unique'] == 0 && $seen_a_primary==FALSE) {
						// if we can't find a primary key we take any unique one
						// (in fact, we show all segments of unique keys
						//  and all unique keys)
						$field_full = $db . '.' . $curr_field['Table'] . '.' . $curr_field['Column_name'];
						$field_v	= $curr_field['Table'] . '->' . $curr_field['Column_name'];
						$selectboxall[$field_full] =  $field_v;
						if ($tbl_type=='INNODB' && isset($curr_table[1]) && $curr_table[1]=='InnoDB') {
							$selectboxall_innodb[$field_full] =  $field_v;
						}

					// for InnoDB, any index is allowed
					} elseif ($tbl_type=='INNODB' && isset($curr_table[1]) && $curr_table[1]=='InnoDB') {
						$field_full = $db . '.' . $curr_field['Table'] . '.' . $curr_field['Column_name'];
						$field_v	= $curr_field['Table'] . '->' . $curr_field['Column_name'];
						$selectboxall_innodb[$field_full] =  $field_v;

					} // end if
				} // end while over keys
			} // end if (PMA_DBI_num_rows)
			PMA_DBI_free_result($fi_rs);
			unset($fi_rs);
		// Mike Beck - 24.07.02: i've been asked to add all keys of the
		// current table (see bug report #574851)
		} elseif ($curr_table[0] == $table) {
			PMA_DBI_select_db($db);

			// need to use PMA_DBI_QUERY_STORE with PMA_DBI_num_rows() in mysqli
			$fi_rs	= PMA_DBI_query('SHOW KEYS FROM ' . PMA_backquote($curr_table[0]) . ';', null, PMA_DBI_QUERY_STORE);
			if ($fi_rs && PMA_DBI_num_rows($fi_rs) > 0) {
				while ($curr_field = PMA_DBI_fetch_assoc($fi_rs)) {
					$field_full = $db . '.' . $curr_field['Table'] . '.' . $curr_field['Column_name'];
					$field_v	= $curr_field['Table'] . '->' . $curr_field['Column_name'];
					$selectboxall[$field_full] =  $field_v;
					if ($tbl_type=='INNODB' && isset($curr_table[1]) && $curr_table[1]=='InnoDB') {
						$selectboxall_innodb[$field_full] =  $field_v;
					}
				} // end while
			} // end if (PMA_DBI_num_rows)
			PMA_DBI_free_result($fi_rs);
			unset($fi_rs);
		}
	} // end while over tables

} // end if


// Now find out the columns of our $table
// need to use PMA_DBI_QUERY_STORE with PMA_DBI_num_rows() in mysqli
$col_rs	= PMA_DBI_try_query('SHOW COLUMNS FROM ' . PMA_backquote($table) . ';', null, PMA_DBI_QUERY_STORE);

if ($col_rs && PMA_DBI_num_rows($col_rs) > 0) {
	while ($row = PMA_DBI_fetch_assoc($col_rs)) {
		$save_row[] = $row;
	}
	$saved_row_cnt  = count($save_row);
	?>
	<fieldset>
	<legend><?php echo $strLinksTo; ?></legend>

	<table>
	<tr><th></th>
	<?php
	if ($cfgRelation['relwork']) {
		echo '<th>' . $strInternalRelations;
		if ($tbl_type=='INNODB') {
			echo PMA_showHint($strInternalNotNecessary);
		}
		echo '</th>';
	}
	if ($tbl_type=='INNODB') {
		echo '<th colspan="2">InnoDB';
		if (PMA_MYSQL_INT_VERSION < 40013) {
			echo '(**)';
		}
		echo '</th>';
	}
	?>
	</tr>
	<?php
	$odd_row = true;
	for ($i = 0; $i < $saved_row_cnt; $i++) {
		$myfield = $save_row[$i]['Field'];
		?>
	<tr class="<?php echo $odd_row ? 'odd' : 'even'; $odd_row = ! $odd_row; ?>">
		<td align="center">
			<b><?php echo $save_row[$i]['Field']; ?></b></td>
		<?php
		if ($cfgRelation['relwork']) {
			?>
		<td><select name="destination[<?php echo htmlspecialchars($save_row[$i]['Field']); ?>]">
			<?php
			// PMA internal relations
			if (isset($existrel[$myfield])) {
				$foreign_field	= $existrel[$myfield]['foreign_db'] . '.'
						 . $existrel[$myfield]['foreign_table'] . '.'
						 . $existrel[$myfield]['foreign_field'];
			} else {
				$foreign_field	= FALSE;
			}
			$seen_key = FALSE;
			foreach ($selectboxall AS $key => $value) {
				echo '				'
					 . '<option value="' . htmlspecialchars($key) . '"';
				if ($foreign_field && $key == $foreign_field) {
					echo ' selected="selected"';
					$seen_key = TRUE;
				}
				echo '>' . $value . '</option>'. "\n";
			} // end while

			// if the link defined in relationtable points to a foreign field
			// that is not a key in the foreign table, we show the link
			// (will not be shown with an arrow)
			if ($foreign_field && !$seen_key) {
				echo '				'
					.'<option value="' . htmlspecialchars($foreign_field) . '"'
					.' selected="selected"'
					.'>' . $foreign_field . '</option>'. "\n";
			}
			?>
			</select>
		</td>
			<?php
		} // end if (internal relations)

		if ($tbl_type=='INNODB') {
			echo '<td>';
			if (!empty($save_row[$i]['Key'])) {
				?>
			<span class="formelement">
			<select name="destination_innodb[<?php echo htmlspecialchars($save_row[$i]['Field']); ?>]">
				<?php
				if (isset($existrel_innodb[$myfield])) {
					$foreign_field	= $existrel_innodb[$myfield]['foreign_db'] . '.'
							 . $existrel_innodb[$myfield]['foreign_table'] . '.'
							 . $existrel_innodb[$myfield]['foreign_field'];
				} else {
					$foreign_field	= FALSE;
				}

				$found_foreign_field = FALSE;
				foreach ($selectboxall_innodb AS $key => $value) {
					echo '				'
						 . '<option value="' . htmlspecialchars($key) . '"';
					if ($foreign_field && $key == $foreign_field) {
						echo ' selected="selected"';
						$found_foreign_field = TRUE;
					}
					echo '>' . $value . '</option>'. "\n";
				} // end while

				// we did not find the foreign field in the tables of current db,
				// must be defined in another db so show it to avoid erasing it
				if (!$found_foreign_field && $foreign_field) {
					echo '				'
						 . '<option value="' . htmlspecialchars($foreign_field) . '"';
					echo ' selected="selected"';
					echo '>' . $foreign_field . '</option>' . "\n";
				}

				?>
			</select>
			</span>
			<span class="formelement">
				<?php
				PMA_generate_dropdown('ON DELETE',
					'on_delete[' . htmlspecialchars($save_row[$i]['Field']) . ']',
					$options_array,
					isset($existrel_innodb[$myfield]['on_delete']) ? $existrel_innodb[$myfield]['on_delete']: '');

				echo '</span>' . "\n"
					.'<span class="formelement">' . "\n";

				PMA_generate_dropdown('ON UPDATE',
					'on_update[' . htmlspecialchars($save_row[$i]['Field']) . ']',
					$options_array,
					isset($existrel_innodb[$myfield]['on_update']) ? $existrel_innodb[$myfield]['on_update']: '');
				echo '</span>' . "\n";
			} else {
				echo $strNoIndex;
			} // end if (a key exists)
			echo '		</td>';
		} // end if (InnoDB)
		?>
	</tr>
		<?php
	} // end for

	echo '	</table>' . "\n";
	echo '</fieldset>' . "\n";

	if ($cfgRelation['displaywork']) {
		// Get "display_field" infos
		$disp = PMA_getDisplayField($db, $table);
		?>
	<fieldset>
		<label><?php echo $strChangeDisplay . ': '; ?></label>
		<select name="display_field" style="vertical-align: middle">
			<option value="">---</option>
		<?php
		foreach ($save_row AS $row) {
			echo '			<option value="' . htmlspecialchars($row['Field']) . '"';
			if (isset($disp) && $row['Field'] == $disp) {
				echo ' selected="selected"';
			}
			echo '>' . htmlspecialchars($row['Field']) . '</option>'. "\n";
		} // end while
		?>
		</select>
	</fieldset>
		<?php
	} // end if (displayworks)
	?>
	<fieldset class="tblFooters">
		<input type="submit" value="<?php echo $strSave; ?>" />
	</fieldset>
</form>
	<?php
} // end if (we have columns in this table)

if ($tbl_type === 'INNODB' && PMA_MYSQL_INT_VERSION < 40013) {
	echo '<div class="warning">'
		.'** ' . sprintf($strUpgrade, 'MySQL', '4.0.13')
		.'</div>';
}

/**
 * Displays the footer
 */
require_once './libraries/footer.inc.php';
?>
